EP0913813A3 - Servo-Schreibkopf - Google Patents

Servo-Schreibkopf Download PDF

Info

Publication number
EP0913813A3
EP0913813A3 EP98308767A EP98308767A EP0913813A3 EP 0913813 A3 EP0913813 A3 EP 0913813A3 EP 98308767 A EP98308767 A EP 98308767A EP 98308767 A EP98308767 A EP 98308767A EP 0913813 A3 EP0913813 A3 EP 0913813A3
Authority
EP
European Patent Office
Prior art keywords
head
tape
magnetic
servo write
ferrite wafer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98308767A
Other languages
English (en)
French (fr)
Other versions
EP0913813B1 (de
EP0913813A2 (de
Inventor
Patricia A. Beck
Paul W. Poorman
George M. Jnr. Clifford
Richard H. Henze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HP Inc
Original Assignee
Hewlett Packard Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP0913813A2 publication Critical patent/EP0913813A2/de
Publication of EP0913813A3 publication Critical patent/EP0913813A3/de
Application granted granted Critical
Publication of EP0913813B1 publication Critical patent/EP0913813B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/60—Guiding record carrier
    • G11B15/62—Maintaining desired spacing between record carrier and head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/584—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/1871—Shaping or contouring of the transducing or guiding surface
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/488—Disposition of heads
    • G11B5/4893—Disposition of heads relative to moving tape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y10T29/49036—Fabricating head structure or component thereof including measuring or testing
    • Y10T29/49043—Depositing magnetic layer or coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y10T29/49048—Machining magnetic material [e.g., grinding, etching, polishing]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y10T29/49055—Fabricating head structure or component thereof with bond/laminating preformed parts, at least two magnetic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y10T29/4906—Providing winding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y10T29/49798—Dividing sequentially from leading end, e.g., by cutting or breaking
EP98308767A 1997-10-28 1998-10-27 Servo-Schreibkopf Expired - Lifetime EP0913813B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US959509 1997-10-28
US08/959,509 US6018444A (en) 1997-10-28 1997-10-28 Batch fabricated servo write head having low write-gap linewidth variation

Publications (3)

Publication Number Publication Date
EP0913813A2 EP0913813A2 (de) 1999-05-06
EP0913813A3 true EP0913813A3 (de) 2000-08-30
EP0913813B1 EP0913813B1 (de) 2006-02-08

Family

ID=25502101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98308767A Expired - Lifetime EP0913813B1 (de) 1997-10-28 1998-10-27 Servo-Schreibkopf

Country Status (4)

Country Link
US (5) US6018444A (de)
EP (1) EP0913813B1 (de)
JP (1) JPH11242803A (de)
DE (1) DE69833417T2 (de)

Families Citing this family (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6269533B2 (en) 1999-02-23 2001-08-07 Advanced Research Corporation Method of making a patterned magnetic recording head
US7196870B2 (en) * 1999-02-23 2007-03-27 Advanced Research Corporation Patterned magnetic recording head with termination pattern having a curved portion
US7773340B2 (en) * 1999-02-23 2010-08-10 Advanced Research Corporation Patterned magnetic recording head having a gap pattern with substantially elliptical or substantially diamond-shaped termination pattern
US20030093894A1 (en) 1999-02-23 2003-05-22 Dugas Matthew P. Double layer patterning and technique for making a magnetic recording head
DE60006984D1 (de) * 1999-10-05 2004-01-15 Seagate Technology Llc Magnetköpfe mit längenveränderlicher spalte für longitudinale aufzeichnung
US20020057524A1 (en) * 1999-11-24 2002-05-16 Beck Patricia A. Servo head having rounded leading edge and methof of using the same
US6989960B2 (en) 1999-12-30 2006-01-24 Advanced Research Corporation Wear pads for timing-based surface film servo heads
US6496328B1 (en) 1999-12-30 2002-12-17 Advanced Research Corporation Low inductance, ferrite sub-gap substrate structure for surface film magnetic recording heads
WO2001065548A1 (fr) * 2000-02-29 2001-09-07 Sony Corporation Tete magnetique, procede d'enregistrement et de reproduction de supports d'enregistrement magnetiques de type bande
US6639753B1 (en) 2000-09-01 2003-10-28 Hewlett-Packard Development Company, L.P. Method of forming a head assembly, a head assembly, and a linear tape drive
US6700729B1 (en) 2000-10-17 2004-03-02 Hewlett-Packard Development Company Alignment marks for tape head positioning
US6433959B1 (en) 2000-10-30 2002-08-13 Storage Technology Corporation Tape head contour utilizing enclosed through slots
US20030099069A1 (en) * 2001-10-10 2003-05-29 Tdk Corporation Magnetic head, method of manufacturing same, and head suspension assembly
US6996033B2 (en) 2002-06-19 2006-02-07 Advanced Research Corporation Optical path for a thermal-assisted magnetic recording head
US20030235011A1 (en) * 2002-06-21 2003-12-25 O-Mass As Head used in combination with wide tape media
US6947256B2 (en) * 2003-01-29 2005-09-20 International Business Machines Corporation Embedded wire planar write head system and method
US7006329B2 (en) * 2003-06-02 2006-02-28 Imation Corp. Magnetic tape head assembly with laterally moveable central section
US6874720B2 (en) * 2003-06-02 2005-04-05 Imation Corp. Data storage tape cartridge with subambient pressure feature
US7167339B2 (en) * 2003-12-03 2007-01-23 International Business Machines Corporation Method for producing and inspecting tape head air-skiving edges
US7031089B2 (en) * 2003-12-17 2006-04-18 Hewlett-Packard Development Company, L.P. Tape head assembly
US7196866B2 (en) * 2003-12-17 2007-03-27 Hewlett-Packard Development Company, L.P. Interconnect structure having multiple layers of traces for electrical connection to a tape head assembly
US8144424B2 (en) 2003-12-19 2012-03-27 Dugas Matthew P Timing-based servo verify head and magnetic media made therewith
US7283317B2 (en) * 2004-01-30 2007-10-16 Advanced Research Corporation Apparatuses and methods for pre-erasing during manufacture of magnetic tape
US20100321824A1 (en) * 2004-02-18 2010-12-23 Dugas Matthew P Magnetic recording head having secondary sub-gaps
JP4253263B2 (ja) * 2004-03-03 2009-04-08 富士フイルム株式会社 サーボライタ
US7204911B2 (en) * 2004-03-19 2007-04-17 Matsushita Electric Industrial Co., Ltd. Process and apparatus for forming discrete microcavities in a filament wire using a polymer etching mask
US7450341B2 (en) * 2004-05-04 2008-11-11 Advanced Research Corporation Intergrated thin film subgap subpole structure for arbitrary gap pattern magnetic recording heads and method of making the same
US7119976B2 (en) * 2005-01-12 2006-10-10 International Business Machines Corporation Planar servo format verifier head
WO2008089665A1 (en) * 2007-01-22 2008-07-31 Lafe Computer Magnetics Limited Tape head method and assembly utilizing split tape stabilizer design
WO2009094516A1 (en) * 2008-01-23 2009-07-30 Advanced Research Corporation Recording heads with embedded tape guides and magnetic media made by such recording heads
US8068302B2 (en) * 2008-03-28 2011-11-29 Advanced Research Corporation Method of formatting magnetic media using a thin film planar arbitrary gap pattern magnetic head
US8083720B2 (en) * 2008-05-13 2011-12-27 Solar Matthew S Device and method for delivering therapeutic agents to an area of the body
WO2011014836A2 (en) * 2009-07-31 2011-02-03 Advanced Research Corporation Erase drive systems and methods of erasure for tape data cartridge
JP5685045B2 (ja) * 2010-01-22 2015-03-18 富士フイルム株式会社 サーボライトヘッド、サーボライタおよびサーボ信号が書き込まれた磁気テープの製造方法
US8861132B2 (en) 2010-07-06 2014-10-14 International Business Machines Corporation Low friction tape head and system implementing same
US8679733B2 (en) * 2011-01-19 2014-03-25 International Business Machines Corporation Patterning process for small devices
US8824100B2 (en) * 2011-05-20 2014-09-02 Seagate Technology Llc Overcoats that include magnetic materials
US8817415B2 (en) 2011-06-13 2014-08-26 Imation Corp. Erasure of magnetic storage media having perpendicular anisotropy
US8804276B2 (en) 2011-06-13 2014-08-12 Imation Corp. Continuous biasing and servowriting of magnetic storage media having perpendicular anisotropy
US8797674B2 (en) 2011-06-13 2014-08-05 Imation Corp. Servo mark length matched to write head gap for magnetic storage media
US8767342B2 (en) 2011-06-13 2014-07-01 Imation Corp. Erasure and servowriting of magnetic storage media having perpendicular anistropy
US8724250B2 (en) 2012-04-03 2014-05-13 Hewlett-Packard Development Company, L.P. Reading magnetic tape
US8867157B2 (en) 2012-04-04 2014-10-21 Imation Corp. Perpendicular pole head for servo writing magnetic media
US8643968B2 (en) 2012-04-26 2014-02-04 Imation Corp. Methods and systems for magnetic media servo writing
US8867167B2 (en) 2012-04-26 2014-10-21 Imation Corp. Tapered pole heads for magnetic media
US8797681B2 (en) 2012-04-26 2014-08-05 Imation Corp. Servo write head having plural spaced front blocks coupled by magnetic posts to a back bar
US8760802B2 (en) 2012-04-26 2014-06-24 Imation Corp. Systems and methods for processing magnetic media with first and second magnetic gaps adjacent opposite sides of the recording layer
US8958175B1 (en) 2014-01-16 2015-02-17 Oracle International Corporation Tape head surface with non-uniform cross-width profile
US9837107B2 (en) * 2016-02-12 2017-12-05 International Business Machines Corporation Tape head with electrically conducting surface to reduce triboelectric charging
US9928855B1 (en) 2016-10-31 2018-03-27 International Business Machines Corporation Tape head and system having asymmetrical construction
US9837104B1 (en) 2016-10-31 2017-12-05 International Business Machines Corporation Tape head having sensors proximate to an edge
US10068591B2 (en) 2016-12-05 2018-09-04 International Business Machines Corporation Head having wrap-controlled flexible media interface
US10418059B2 (en) 2016-12-06 2019-09-17 International Business Machines Corporation Methods for selecting wrap angle for inducing tape tenting above transducer

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3145452A (en) * 1958-03-24 1964-08-25 Iit Res Inst Method of making a magnetic head
US3582917A (en) * 1968-12-13 1971-06-01 Ibm Magnetic head having a continuously variable radius of curvature
US4373173A (en) * 1981-03-19 1983-02-08 International Business Machines Corporation Multi-element head assembly
US4979051A (en) * 1988-03-22 1990-12-18 Eggebeen James A Bimodal multi-track magnetic head
US5123156A (en) * 1988-12-23 1992-06-23 Thomson-Csf Method for the production of a read-write magnetic head
EP0690442A2 (de) * 1994-06-30 1996-01-03 International Business Machines Corporation Servosteuerungssystem
US5572392A (en) * 1994-11-17 1996-11-05 International Business Machines Corporation Arbitrary pattern write head assembly for writing timing-based servo patterns on magnetic storage media

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414895A (en) * 1966-01-14 1968-12-03 Honeywell Inc Magnetic head with means for assuring firm tape-head contact
GB1409890A (en) * 1972-12-29 1975-10-15 Data Recording Instr Co Manfuacture of magnetic elements for use in multi-track magnetic heads
US4285019A (en) * 1980-03-10 1981-08-18 Memorex Corporation Contoured magnetic recording head/slider assembly
DE3421083A1 (de) * 1983-06-09 1984-12-13 Alps Electric Co., Ltd., Tokio/Tokyo Magnetkopf zur vertikalaufzeichnung
JPS60182006A (ja) * 1984-02-29 1985-09-17 Victor Co Of Japan Ltd 磁気ヘツド
US4797767A (en) * 1986-11-20 1989-01-10 American Magnetics Corporation Digital magnetic head structure
US4967301A (en) * 1988-08-22 1990-10-30 International Business Machines Corporation Shallow magnetic head shield for reducing feedthrough
JPH02156493A (ja) * 1988-12-09 1990-06-15 Victor Co Of Japan Ltd 浮上型磁気ヘッド構体
US5136775A (en) * 1989-01-19 1992-08-11 Pioneer Electronic Corporation Method of manufacturing a magnetic head having wear resisting films
US4996609A (en) * 1989-02-22 1991-02-26 Pericomp Corporation Magnetic head recording multitrack servo patterns
US5144741A (en) * 1989-08-11 1992-09-08 Pioneer Electronic Corporation Method of manufacturing a magnetic head with two canted gaps
JP2760137B2 (ja) * 1990-05-31 1998-05-28 ソニー株式会社 磁気ヘッドの製造方法
US5210929A (en) * 1991-03-18 1993-05-18 Applied Magnetics Corporation Method of making a ferrite capped Winchester-style slider
US5214553A (en) * 1991-04-29 1993-05-25 Digital Equipment Corporation Magnetic contact recording head for operation with tapes of varying thicknesses
US5289330A (en) * 1991-10-02 1994-02-22 Alliant Techsystems Inc. Helical read/write head having a cross-cut groove
DE69218908T2 (de) * 1992-01-06 1997-07-17 Tandberg Data Magnetkopf für stabilen Kontaktdruck zwischen Polspitze und Band trotz Kopfverschleiss und Bandspannungveränderung
JP3538437B2 (ja) * 1993-04-02 2004-06-14 シチズン時計株式会社 複合型磁気ヘッド用コアの製造方法
US5423116A (en) * 1993-07-21 1995-06-13 Storage Technology Corporation Method of manufacturing a multi-track longitudinal, metal-in-gap head
US5414783A (en) * 1993-09-24 1995-05-09 Xerox Corporation Write head for a MICR reader having an adjustable field profile
JPH08235517A (ja) * 1994-05-10 1996-09-13 Mitsubishi Electric Corp 磁気ヘッド及びその製造方法
US5602703A (en) * 1994-12-27 1997-02-11 Seagate Technology, Inc. Recording head for recording track-centering servo signals on a multi-track recording medium
US5512222A (en) * 1995-03-15 1996-04-30 Foamex L.P. Method of using a chilled trough for producing slabs of polyurethane foam
KR970002883A (ko) * 1995-06-30 1997-01-28 배순훈 자기헤드 및 그 제조 방법
JPH10188212A (ja) * 1996-12-25 1998-07-21 Sony Corp 磁気ヘッド
US5946156A (en) * 1997-03-04 1999-08-31 Imation Corp. Tape servo system and methods, write/read heads, and servo track configurations regarding same
US5953184A (en) * 1997-09-30 1999-09-14 Storage Technology Corporation Transverse slotted magnetic tape head assembly
US5855056A (en) * 1997-11-20 1999-01-05 Storage Technology Corporation Method for fabricating magnetic heads having varying gap lengths on a common wafer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3145452A (en) * 1958-03-24 1964-08-25 Iit Res Inst Method of making a magnetic head
US3582917A (en) * 1968-12-13 1971-06-01 Ibm Magnetic head having a continuously variable radius of curvature
US4373173A (en) * 1981-03-19 1983-02-08 International Business Machines Corporation Multi-element head assembly
US4979051A (en) * 1988-03-22 1990-12-18 Eggebeen James A Bimodal multi-track magnetic head
US5123156A (en) * 1988-12-23 1992-06-23 Thomson-Csf Method for the production of a read-write magnetic head
EP0690442A2 (de) * 1994-06-30 1996-01-03 International Business Machines Corporation Servosteuerungssystem
US5572392A (en) * 1994-11-17 1996-11-05 International Business Machines Corporation Arbitrary pattern write head assembly for writing timing-based servo patterns on magnetic storage media

Also Published As

Publication number Publication date
US7206167B2 (en) 2007-04-17
DE69833417D1 (de) 2006-04-20
US6018444A (en) 2000-01-25
EP0913813B1 (de) 2006-02-08
US6229669B1 (en) 2001-05-08
US20030030939A1 (en) 2003-02-13
JPH11242803A (ja) 1999-09-07
DE69833417T2 (de) 2006-08-10
US6999274B2 (en) 2006-02-14
EP0913813A2 (de) 1999-05-06
US20050068668A1 (en) 2005-03-31
US6647613B2 (en) 2003-11-18
US20010007170A1 (en) 2001-07-12

Similar Documents

Publication Publication Date Title
EP0913813A3 (de) Servo-Schreibkopf
EP0332320A3 (de) Herstellungsverfahren von magnetischen Aufzeichnungspolen
US5652015A (en) Process for fabricating an arbitrary pattern write head
US5991119A (en) Proximity head slider having recessed magnetoresistive read transducer
EP0851411A3 (de) Dünnschicht-Magnetkopf und magnetisches Aufnahme/Wiedergabe-Gerät
EP0361809A3 (de) Herstellungsverfahren eines Magnetkerngleiters für Festplattenspeicher unter Anwendung von laserinduziertem Ätzen
EP0475397A3 (de) Flächenförmiger dünnschichtiger Magnetkopf
US5130877A (en) Thin film head on ferrite substrate with inclined top pole
WO1998044487A3 (en) Method of manufacturing a magnetic head having a structure of layers
US20010055183A1 (en) Contact planar magnetoresistive head
EP1267332A3 (de) In Mengen angefertigter Servoschreibkopf
WO2002007153A3 (en) Domain control in shields of a magnetic transducer
KR100274098B1 (ko) 자기 기록/판독 헤드 및 그 제조 방법
US6793961B2 (en) Enhancement of magnetization switching speed in soft ferromagnetic films through control of edge stress anisotropy
US5973891A (en) Data transducer and method for writing data utilizing the bottom pole as the trailing edge of a thin-film magnetic tape write head
US6288871B1 (en) Thin film magnetic head and magnetic disk apparatus using the same
ATE326046T1 (de) Herstellungsverfahren eines magnetkopfes mit planarer wicklung
JP2003006806A5 (de)
US5936814A (en) Magnetic recording head using a last insulator to obtain an adjustable take off angle
KR900004743B1 (ko) 수직 자기기록용 자기헤드 및 그 제조방법
EP0821348A3 (de) Entkoppelter Magnetkopf
WO1995034885A3 (en) Magneto-optical recording medium
US5279026A (en) Process for producing a thin-film magnetic tape head
JPS5577025A (en) Erasing head
EP0152064A3 (de) Dünnfilm-Magnetkopf und Herstellungsverfahren

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB NL

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIC1 Information provided on ipc code assigned before grant

Free format text: 7G 11B 5/55 A, 7G 11B 5/584 B, 7G 11B 15/62 B, 7G 11B 5/127 -

17P Request for examination filed

Effective date: 20001113

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HEWLETT-PACKARD COMPANY, A DELAWARE CORPORATION

AKX Designation fees paid

Free format text: DE FR GB NL

17Q First examination report despatched

Effective date: 20040420

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69833417

Country of ref document: DE

Date of ref document: 20060420

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20061109

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20101024

Year of fee payment: 13

Ref country code: FR

Payment date: 20101105

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20101027

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20101025

Year of fee payment: 13

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20120501

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20111027

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20120629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120501

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120501

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69833417

Country of ref document: DE

Effective date: 20120501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111027

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111102